Morningstar 300W Pure Sine Inverter


Morningstar SureSine 300W Pure Sine Inverter Model SI-300-115V


300W Pure Sine Inverter

The Sure Sine 300 produces pure sine 120VAC power from a 12V battery. Ideal for sensitive electronics off a 12V power supply or battery bank.
This 300W pure sine wave inverter designed specifically to meet the needs of rural PV electrification requiring AC power including solar home systems, schools, community centers and health clinics. This inverter is also a good choice for small PV systems for telecom, remote cabins and weekend homes, and RV/caravans and boats.
Key Features
  • Improved Load Operation
    • Pure Sine Wave
    • Toroidal Transformer Design
    • Outstanding Surge Capability
  • More Power Available
    • High Efficiency
    • Low Self-Consumption
  • Extreme High Reliability
    • Extensive Electronic Protections
    • No Internal Cooling fan
    • Tropicalization
  • Remote On/Off
  • Adjustability

Additional information

AC Output Voltage (RMS)

115V /- 10%

Nominal Power Rating

300 Watts @ 25°C

Peak Power Rating

600 Watts @ 25°C (15 min)

DC Input Voltage

10.0 V – 15.5V

Self-Consumption (AC Output OFF)

25 mA

Self-Consumption (AC Output ON)

450 mA

AC Output Frequency

60 Hz /- 0.1%

Peak Efficiency


Total Harmonic Distortion (THD)

< 4%


Pure Sine Wave

Operating Temperature Range

'-40°C to 45°C

Storage Temperature

'-40°C to 85°C


100% Non-condensing


Type 1 (Indoor Only)

Low Voltage Disconnect

11.5 V / 10.5 V

Low Voltage Reconnect

12.6 V / 11.6 V

High Voltage Disconnect

15.5 V

High Voltage Reconnect

14.5 V


213 x 152 x 105 mm / 8.4 x 6.0 x 4.1 in


4.5 Kg / 10.0 lbs

Enclosure Rating


Manufacturer Warranty

2 Year

DC Disconnect